{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["astronomical object", "location", "animal", "organization", "media", "vehicle"], "input": "Within a few hours , the extravascular blood cells form a clot called a hematoma that acts as a template for callus formation ."}
{"astronomical object": [], "location": [], "animal": [], "organization": [], "media": [], "vehicle": []}